In 2001, Chen Xiaoci and Li Niansheng met in Qingzheng High School and came together after many difficulties but stumbled. After the college entrance examination, although Li Niansheng did not go to college, Chen Xiaoci was always by his side. They thought their life would be wonderful in the future, but bad luck befell them several times. Li Niansheng returned to 2001 20 years later.